Improvement in rivet-setting machines



UNITE Sans MYRON D. BROOKS, OF BOSTON, MASSACHUSETTS.

IMPROVEMENT' IN RIVET-SETTING( MACHINES.

Specification formingpart oi' Letters Patent No. 142,434, dated Septcmber 2, 1873; application filed August 1,1873.

. To all whom it may concern:

' rivets set in iron plates; and it consists in the combination, with an ordinary reciprocating plunger for forcing the rivet through the material and onto or against a stationary clinchingor riveting die, of a pair of hook-jaws, so arranged and connected thereto as to move with said plunger during the greater part of its movement in either direction, and so arranged, in combination with said plunger and iiXed pins, lugs, or abutments attached to or forming a part of the stationaryframe of the machine, that the rst part of the upward motion of said plunger will cause said jaws to approach each other and gripev the shank of the rivet just above the head, the hooks on said jaws being just far enough above the top of the plunger to allow the rivet-head to be fed under the same before the plunger commences to move, and the continuation of said upward movement of the plunger carrying the rivet firmly griped between said jaws upward, until the rivet has fairly entered the material, when said jaws are again thrown apart to release the rivet, and their upward motion ceases, while the plunger continues to move upward to clinch or head therivet, as will be more fully described.

In the drawings, Figure l is a side elevation of so much of a rivet-setting machine as pertains to my invention. Fig. 2 is a section on line .r w on Fig. l, showing the plunger and hooked jaws in front elevation. Fig. 3 is a section on line y y on Fig. l, showingthe plunger and hooked jaws in their relative positions at halistroke. Fig. 4 is a correspond ing section, with the parts in position as seen when the upward stroke is completed. Fig. 5 is a plan ofthe plunger and jaws, and Fig. 6

is a modification illustrating a dierent manner of hanging the hooked jaws.

A is a portion of the frame of the machine, in the upper portion of which is set the anvil set or clincher B, of a proper form for clinching a tubular rivet. C is a plunger titted to slide in the frame A, to the lower end of which, at a, is connected any suitable mechanism for imparting thereto the desired reciprocatin g motion. Said plunger maybe rectangular in cross-section, as shown, or cylindrical, and has formed in opposite sides thereof two rectangular grooves, extending longitudinally thereof nearly the whole length of vsaid. plunger, in which are embedded the jaw-bars b b, provided with hooks at their upper ends, the points of which are curved to lit the circum- The jaw-bars b b are also provided with the lshoulders d and e near their lower ends, and

one upon either side of the pins f, and between which the pins f reciprocate as the plunger is moved up and down, said pins f being set in the plunger', this provision being made to allow the plunger to move at times without carrying the jaws with it. Said jaw-bars b b are also provided with the shoulders g and h, and a cam-surface extending from one to the other, so formed and arranged, iu relation to the pins Mset in the frame of the machine and the springs j placed between said jaw-bars and the plunger C, that the reciprocating motion ofthe plunger and said jaw-bars shall cause a lateral motion to be imparted to the upper ends of said jaw-bars at the proper time to close onto the rivet when it is placed in position, and hold it iirmly until its upper end is fairly inserted in the material, and then open them to release the rivet, at which time the upward motion of said jaws ceases, while the plunger continues to move upward and clinches the rivet onto the material.

In the modification shown in Fig. 6 the jaws are pivoted together at or near the middle of their length, and cross each other like the blades of a pair of shears, a slot being formed through the center ofthe plunger for the passage of said jaws, and the fulcrum-pin l, about which said jaws vibrate, passing through au` other slot formed in the plunger at right al1-- gies to the one previously mentioned.

The lateral motion of the jaws and the limitation of their reciprocating motion are obtained in a similar manner to that already described; but the cam-surfaces and the stops or shoulders g and h, are formed in the side of the bearing in which the plunger reciprocates, and they act upon projections n on the lower ends of the jaw-levers.

What I claim as new, and desire to secure by Letters Patent of the United States, is-

l. In a machine for setting rivets, the combination of a reciprocating plunger for heading` or clinching the rivet and a pair of clamping-jaws connected therewith, and arranged to reciprocate with said plunger during a portion of its stroke, and to move laterally to clamp the rivet and guide it to the work and release it again at the proper time, when said motions are imparted to said jaws by the reciprocating plunger, substantially as described.

2. In combination with the reciprocating plunger of a rivet-setting machine, a pair of clamping-jaws, b b, provided with hooks at their upper ends, the shoulders g and h, and a cam-shaped surface between said shoulders upon their outer edges, to be acted upon by the pins i i, to limit their endwise motion, and impart thereto the desired lateral motion to clamp and release the rivet, or their mechanical equivalents, substantially as described.

3. The combination of the plunger G, provided with the pins f, with the clamping-jaws b b, provided with the shoulders d and e, or their equivalents, arranged and operating as described, for the purpose specified.

Executed` at Boston this 29th day of July,

MYRON D. BROOKS. Witnesses:

N. C. LOMBARD, S. A. Woon. 

